The solid circular steel shaft of a screwdriver is subjected to a pure torque of T = 21 lb·in. The shaft has a diameter of 0.235 in. and a length of L = 4.25 in. The shear modulus of the steel is G = 12,000 ksi. Determine the magnitude of the angle of twist of the shaft in degrees.

The same torque is applied to three socket extensions. They have the same length and modulus of rigidity but different diameters. Which one will have the smallest maximum shear stress?

A rock suspended by a weighing scale weighs 25 N out of water and 8 N when submerged in water. What is the buoyant force on the rock?

The same torque is applied to three socket extensions. They have the same length and modulus of rigidity but different diameters. Which one will have the largest polar moment of inertia?

How much is the buoyant force that acts on a 100,000-N ship?

The solid circular steel shaft of a screwdriver is subjected to torque T. The shaft has a diameter of 0.463 in. and a length of L = 3.75 in. For a factor of safety of 2.5 and a shearing yield strength of 17 ksi, determine the maximum torque T that can be applied to the shaft.

A torque of 27 lb·in. is applied to one end of a 6-in.-long composite shaft that consists of two polymer tubes. The outer tube has a polar moment of inertia of 0.0488 in.4 and a shear modulus of 160 ksi. The inner tube has a polar moment of inertia of 0.00501 in.4 and a shear modulus of 190 ksi. Determine the magnitude of the torque produced in the outer tube.

The solid circular steel shaft of a screwdriver is subjected to torque T. The shaft has a diameter of 0.527 in. and a length of L = 4.25 in. For a factor of safety of 2.0 and a shearing yield strength of 19 ksi, determine the maximum torque T that can be applied to the shaft.

You will be required to submit at least 6 excursion reflections.   

A steel [E = 30,400 ksi, G = 11,600 ksi] socket extension (2) has a diameter of 0.50 in. and a length of L = 1.3 in. It connects socket (3) to ratchet handle (1) which is 7.0 in. long. If a perpendicular force of 17 lb is applied to the end of the ratchet handle, determine the maximum shear stress in the socket extension.